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DE682611C - Arrangement to prevent the formation of bridges in arc reduction ovens - Google Patents

Arrangement to prevent the formation of bridges in arc reduction ovens

Info

Publication number
DE682611C
DE682611C DES130718D DES0130718D DE682611C DE 682611 C DE682611 C DE 682611C DE S130718 D DES130718 D DE S130718D DE S0130718 D DES0130718 D DE S0130718D DE 682611 C DE682611 C DE 682611C
Authority
DE
Germany
Prior art keywords
arrangement
bridges
arrangement according
devices
prevent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DES130718D
Other languages
German (de)
Inventor
Reinhold Gross
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens and Halske AG, Siemens Corp filed Critical Siemens and Halske AG
Priority to DES130718D priority Critical patent/DE682611C/en
Application granted granted Critical
Publication of DE682611C publication Critical patent/DE682611C/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces ; Tank furnaces
    • F27B3/10Details, accessories or equipment, e.g. dust-collectors, specially adapted for hearth-type furnaces
    • F27B3/18Arrangements of devices for charging
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/08Apparatus
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00Heating by electric discharge
    • H05B7/18Heating by arc discharge
    • H05B7/20Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

Anordnung zur Verhinderung von Brückenbildung bei Lichtbogenreduktionsöfen Bei elektrischen Lichtbogenöfen wird oft beobachtet, daß ein Zusammenbacken der Beschickung eintritt. Während ein Teil der Charge schon längst niedergeschmolzen ist, bildet der Rest feste Brücken über der Schmelze. Unter diesen Schichten, die .oft eine beträchtliche Dicke aufweisen, sind meistens Gase, die durch den Reaktionsverlauf frei werden, eingeschlossen. Diese können nicht entweichen und geben häufig, wenn der Druck zu hoch anzeigt oder sich entzündliche Gemische bilden, Anlaß zu Explosionen. Bei Carbidöfen wurde dieses Zusammenbacken öfters festgestellt und ihm durch einfache Stochervorrichtungen, die an verschiedenen Punkten der Oberfläche .angebracht wurden, wirksam begegnet.Arrangement to prevent bridging in arc reduction furnaces In electric arc furnaces it is often observed that caking of the Loading occurs. While part of the batch has long since melted down the remainder forms solid bridges over the melt. Under these layers that .often a considerable thickness, are mostly gases, which by the course of the reaction become free, included. These cannot escape and often give up, though the pressure is too high or flammable mixtures form, cause explosions. In carbide ovens, this caking has often been found, and it was caused by simple Poking devices placed at various points on the surface. effectively countered.

Bei den Reduktionsöfen erwiesen sich die bekannten Einrichtungen jedoch als ungeeignet. Die Brückenbildung tritt hier hauptsächlich in nächster Nähe der Elektroden auf Dadurch entstehen nicht nur unerwünschte Gasräume, sondern die Steuerung der Elektroden wird außerordentlich erschwert. Das Beschickungsmaterial wird durch die Wärme beeinflußt und bildet besonders bei ungleicher Korngröße der Chargierung schwere und harte Brocken.In the case of the reduction furnaces, however, the known devices were found as unsuitable. The bridging occurs here mainly in the immediate vicinity of the Electrodes on This creates not only undesirable gas spaces, but the control the electrodes is extremely difficult. The feed material is through the heat influences and forms especially if the grain size of the charge is unequal heavy and hard chunks.

Erfindungsgemäß kann diese Brückenbildung bei Reduktionsöfen vollständig vermieden werden, wenn rund um die einzelnen Elektroden geeignete Stochervorrichtungen angeordnet werden. Die Anbringung solcher Vorrichtungen an anderen Punkten des Ofens hat sich nicht als zweckmäßig erwiesen. Die vorzugsweise aus Stahl bestehenden Stempel werden durch einen in einem Zylinder laufenden Kolben unter Verwendung von flüssigen oder gasförmigen Treibmitteln. vorwärts getrieben. Die Stempel könnenerforderlichenfa.lls gekühlt werden. Fig. i zeigt, wie eine Anzahl von .solchen Stochervorrichtungen rund um die Elektrode ,angeordnet wird. `'Durch Verwendung von Kugelgelenken können diese Vorrichtungen hin und her geschwenkt werden,' so d.aß die ganze Umgebung der Elektrode vori ihnen bestrichen wird. Der Hub und der Ausschlag werden z. B. durch Anschläge so begrenzt, daß eine Beschädigung der Elektroden sicher vermieden wird. Es hat sich auch als zweckmäßig erwiesen, die Hubbegrenzung durch selbsttätige Vorrichtungen so zu lenken, daß im Augenblick des Durchstoßens der Stochervorrichtung durch die Brücke auf den Stempel keine Kraftwirkung mehr ausgeübt wird.According to the invention, this bridging can be complete in reduction furnaces can be avoided if suitable poking devices are used around the individual electrodes to be ordered. The placement of such devices at other points in the furnace has not proven to be appropriate. The stamp, which is preferably made of steel are made by a piston running in a cylinder using liquid or gaseous propellants. driven forward. The stamps can be used if necessary be cooled. Fig. I shows how a number of .such poking devices around the electrode. '' By using ball joints you can these devices are swung back and forth, so that the whole area around the Electrode before they are painted. The stroke and the deflection are z. B. by Limit stops so that damage to the electrodes is reliably avoided. It has also proven to be useful to limit the stroke by means of automatic devices to steer so that at the moment of piercing the poking device through the Bridge on the punch no more force is exerted.

Durch diese Vorrichtungen wird ermöglicht, einen ruhigen und sicheren Betrieb von Reduktionslichtbogenöfen zu gewährleisten. Die durch Brückenbildung bewirkte Elektrodenverschiebung nach oben, die Energieverluste und schwere Störungen des Betriebes zur Folge hat, wird durch die erfindungsgemäße Anordnung verläßlich vermieden.These devices enable a quiet and safe To ensure the operation of reduction arc furnaces. The one through bridging caused electrode displacement upwards, the energy losses and severe disturbances of the operation is made reliable by the arrangement according to the invention avoided.

Claims (5)

PATENTANSPRÜCHE i. Anordnung zur Verhinderung von Brückenbildungen bei Lichtbogenreduktionsöfen, dadurch gekennzeichnet, daß Stochervorrichtungen um jede einzelne Elektrode konzentrisch angeordnet sind. PATENT CLAIMS i. Arrangement to prevent bridging in arc reduction furnaces, characterized in that poking devices around each individual electrode are arranged concentrically. 2. Anordnung nach Anspruch i, dadurch gekennzeichnet, daß die Stochervorrichtungen nach allen Richtungen hin schwenkbar ausgebildet sind. 2. Arrangement according to claim i, characterized in that the poking devices in all directions are designed to be pivotable. 3. Anordnung nach Anspruch i und 2, dadurch gekennzeichnet, daß durch Anschläge eine Beschädigung der Elektroden durch die Stochervorrichtungen verhindert wird. q.. 3. Arrangement according to claim i and 2, characterized in that that attacks damage the electrodes by the poking devices is prevented. q .. Anordnung nach Anspruch i und 2, dadurch gekennzeichnet, daß der Hub .der Stochervorrichtungen derart einstellbar ist, daß nach Durchdringung der Brücken ein weiteres Vorschieben der Stochervorrichtungen vermieden wird. Arrangement according to claims i and 2, characterized in that the stroke of the poking devices is adjustable in such a way that after penetration the bridges a further advancement of the poking devices is avoided. 5. Anordnung nach Anspruch q., dadurch gekennzeichnet, daß als Treib- und zugleich als Kühlmittel Druckwasser oder Drucköl Verwendung finden.5. Arrangement according to claim q., Characterized in that as driving and at the same time Pressurized water or pressurized oil are used as coolants.
DES130718D 1938-02-05 1938-02-05 Arrangement to prevent the formation of bridges in arc reduction ovens Expired DE682611C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES130718D DE682611C (en) 1938-02-05 1938-02-05 Arrangement to prevent the formation of bridges in arc reduction ovens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES130718D DE682611C (en) 1938-02-05 1938-02-05 Arrangement to prevent the formation of bridges in arc reduction ovens

Publications (1)

Publication Number Publication Date
DE682611C true DE682611C (en) 1939-10-18

Family

ID=7538526

Family Applications (1)

Application Number Title Priority Date Filing Date
DES130718D Expired DE682611C (en) 1938-02-05 1938-02-05 Arrangement to prevent the formation of bridges in arc reduction ovens

Country Status (1)

Country Link
DE (1) DE682611C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508004A (en) * 1948-03-13 1950-05-16 Ajax Electric Company Inc Electric salt bath furnace
DE1090696B (en) * 1954-12-24 1960-10-13 Elektrokemisk As Poking device for electrode reduction ovens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508004A (en) * 1948-03-13 1950-05-16 Ajax Electric Company Inc Electric salt bath furnace
DE1090696B (en) * 1954-12-24 1960-10-13 Elektrokemisk As Poking device for electrode reduction ovens

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